Benefits of KOP-R Roof Insulation Easy to use — KOP-R Roof Insulation is remarkably tough but easy to handle and install. The facers are integrally laminated to the rigid polyisocyanurate foam core, giving each board superior dimensional stability and making it simple to cut with a standard roofer’s knife. KOP-R Roof Insulation is also extremely lightweight, making it easier to handle, and better for your overall job productivity, when insulating efficiency is required. Also, its construction gives it the superior strength required for roofing applications. Variety of sizes — KOP-R Roof Insulation is available in 4' X 4' (1.22m X 1.22m) and 4' X 8' (1.22 x 2.44m) boards, and in thicknesses from 1.0" to 4.0" (25.4mm to 102mm).  Return to Koppers KOP-R Roof Insulation - Isocyanurate